Monkey-wrench.



PATENTED APR. 23, 1907.

No. 851,416. I

' H.B.HARDY.

MONKEY WRENCH.

APPLICATION FILED JAN. 21, 1907.

HARRY B. HARDY, OF AKRON, OHIO.

MONKEY-WRENCH.

Specification of Letters Patent.

Patented April 23, 1907.

Application filed January 21, 1907. Serial No. 353,258.

To aZZ whom it may concern.-

Be it known that I, HARRY B. IIARDY, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented new and useful improvements in Monkey-Wrenches, of which the following is a specification.

This invention relates to monkey-wrenches and the object thereof is to construct the Same so that that loose jaw of the wrench may be temporarily disconnected from the screw, by which it is ordinarily manipulated, in order to permit it to be freely slidable on the shank and to make the means carried by the loose jaw and used for engaging the screw, in such a manner that it automatically interlocks with the screw, thus enabling the jaw to be manipulated thereby when the members are in engagement with each other.

A practical embodiment of this invention is shown in the drawings in which similar reference numerals indicate like parts in the different figures.

In the drawings, Figure 1 is a side elevation of my improved wrench; Fig. 2 is a section at the line 90, and, Fig. 3 a longitudinal section of the locking device.

In the drawings, the reference numeral 1 denotes the handle of an ordinary monkeywrench to which is attached the shank 2, which is of common construction, terminating in a fixed jaw 3. Mounted on the shank 2 is the loose jaw 4. secured in position by integral members 5 and 9 enclosing the shank. The main portion 6 of this loose jaw is perforated to freely receive a screw 7 provided with the ordinary corrugated head 8 for ease of manipulation.

My invention for locking the loose jaw in position is secured to the member 9 and consists preferably of a rectangular frame 10 se cured to the member by means of cap screws or similar devices 11. These cap screws 11 pass through slots 12 in the frame 10 to 'per- Init the raising of the entire frame as desired. The upper part of this frame 10, designated in the drawings by the reference numeral 13, encloses screw 7 and is threaded on its inner face to engage the threads thereof. Between the under face of the member 9 and the bottom of the frame 10 is a spring 14 which serves to normally keep the upper portion 13 of the frame 10 in mesh with the screw 7 unless intentionall y raised.

The operation of this device is as follows: If at any time the opening between the jaws of the wrench is to be altered a considerable distance, the operator presses upward on the lower end of the frame 10 which raises the interiorly-threaded head thereof from ongagement with the screw 7 and the loose jaw l may then be slid longitudinally of the shank 2 any desired distance and a release of pressure on the frame 10 will restore engagement between the frame 10 and the threads of the screw 7. If the distance which the jaw 4 is to be moved is very slight, or close adjustment is required, the screw 7 may be manipulated in the ordinary manner by means of the head 8, the screw 7 engaging the frame 10 secured to the jaw t.

In the construction shown in Fig. 3 the threads are cut so as to be in substantially the form of ratchet teeth and in using a wrench having threads of this type, all that is necessary in order to move the jaw 4 towards the fixed jaw 3 is to push the same forward along the shank 2 the teeth of the frame 10 slipping easily over the inclined surfaces of the threads and at the same time the strength of the wrench is in no wise impaired as the front faces of the threads are flat, as shown in Fig. l.

In using the modification shown in Fig. 3, it is not necessary to raise the frame 10 from engagement with the threads in order to move the loose jaw towards the fixed jaw;

but it is necessary to raise it in reversing this operation.

\V hat I claim and desire to secure by Letters Patent, is

1. The combination in a monkey-wrench having a fixed jaw and shank, of a loose jaw enclosing said shank and slidable thereon, a screw mounted for revolution projecting into said loose jaw, a frame enclosing a portion of said loose jaw provided with slots on the I sides thereof, screws meshing into suitable .openings in said loose jaw and passing through said slots whereby said frame may be moved with respect to said jaw, said frame being further provided. on its inner, upper face with a threaded portion arranged to mesh with the threads on said screw, a spring interposed between said loose member and the lower portion of said frame for normally maintaining engagement between said frame and said screw.

2. A loose jaw for a monkey-wrench comprising a body portion arranged to enclose the shank of the wrench and slidable thereon, a frame arranged to enclose said body portion having its upper portion formed with a semi-cylindrical opening therein with threads in the inner surface thereof, screws secured to body portion and passing through. slots in said frame to permit movement of said frame, a screw to normally actuate said loose jaw and be engaged by said frame, a spring interposed between the lower face of said body and the bottom portion of said frame for normally maintaining engagement between said semi-cylindrical portion and the upper surfaces of the threads of said screw, all constructed substantially as shown and described and for the purposes set forth.

In testimony whereof I have hereunto set 15 my hand in presence of two subscribing witnesses.

HARRY B. HARDY.

Witnesses:

C. E. HUMPI-IREY, GLENARA FOX. 

